An L6 engine and a V8 engine of similar size are not as good a match as appears at first glance.
A single manifold (regardless of the number of carburetor throats) supplying a six-cylinder engine has fewer, larger, and more widely spaced intake pulses (each cylinder is 1∕6th or 16.7% of the total displacement, and has an intake stroke every 120°) than a V8 engine of the same total displacement (each cylinder is 1∕8th or 12.5% of the displacement, with an intake stroke every 90°). Each L6 cylinder is ⅓ larger, with vacuum pulses spaced ⅓ farther apart than a V8 of the same total displacement, thus increasing the amplitude and reducing the frequency of the vacuum pulses.
The L6 needs a carburetor about 10% larger than the V8 of similar size.
